bigote
m.
(Noun)
"mustache"
Late 15th cent. First recorded as bigot de barva with -e later added via anaptyxis. Probably borrowed from Swiss German bî Gott "by God!," taken from Swiss German mercenaries during the Seige of Granada in 1483 - mercenaries who often sported prominent facial hair (Lapesa 1987). Previous theories hypothesized a borrowing from Old French bigot, slang for mustachioed Norman soldiers; from the Norman surname Bigot; or from Old French bigot "pastry resembling a mustache" (see Corominas 1991; Roberts 2015; Covarrubias 1611 respectively). Lapesa's theory has the benefit of both time and place for the word to enter into Spanish.
Also a metaphor for the remnant of drink on the upper lip (cf. English milk mustache).

bio-
(Prefix)
"life"
First appearing as a prefix in the 17th cent. Borrowed Ancient Greek βίος (bíos) "life."
From Proto-Indo-European *gwei̯H- (the laryngeal was probably *h3) "to live" (of the same origin as vivir).